Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:2002.01669 · IET conference proceedings.

Steering information in quantum network

NASSER METWALLY

Published Jun 7, 2021• 5 citations
arXivHTMLPDF

Abstract

In this contribution, we investigate the possibility that one member of a quantum network can steer the information that encoded in the state of other member. It is assumed that, these members have a direct or indirect connections. We show that, the steerability increases at small values of the channel' strength. Although, the degree of entanglement between the direct interacted nodes is smaller than that displayed for the non-interacted nodes, the possibilities of steering a member of the direct interacted nodes and the non-direct nodes are almost similar.

DOI
10.1049/icp.2021.1341

Related papers

Quantum Network Coding Based on Quantum Steering

Tao Shang, Jiayu Liu, Yuchen Liu +3 more

Quantum steering is a physical resource that has important application value in quantum information. Quantum network coding provides an alternative solution for quantum-state distribution, especially when the bottleneck problems must be considered and high communication speed is required. In this paper, we introduce quantum steering into quantum network coding, and propose a feasible quantum network coding scheme to transmit any of the four quantum states in butterfly networks. By only using the steerable property, we make an attempt to relax the restriction on entangled quantum pairs to quantum steering.

International Conference on Wireless Communications and Signal Processing (WCSP)•Nov 2, 2023•2 citations

Quantum steering transfer within quantum network

Xiao‐Gang Fan, Jiaojiao Chen, Wei Hao Xiong +2 more

Abstract Quantum steering is the ability that one system affects another one without delay by performing local measurements, which has garnered significant attention in the field of quantum information science. Here, we propose a linear network to realize tunable quantum steering with adjustable measurements. We show that forward steering of the first entangled source can be perfectly transferred to the state of two endpoints, regardless of measurements in the quantum network. However, for the backward steering between two endpoints, it displays a four-leaf clovers with rich symmetries with measurement parameters { θ j } j = 1 N − 1 and is dependent on the parameters { β j } j = 2 N of the input state. By tuning the measurements far away from or close to the optimal values, one-way or two-way steering can be controllably realized. In addition, the error between the actual and optimal measurements is also taken into account in our proposal. The result indicates that a smaller error is beneficial for predicting two-way steering involving multiple measurements. Our proposal offers a promising way to realize the quantum steering transfer within linear networks.

New Journal of Physics•Jun 1, 2025•1 citation

Witnessing network steerability of every bipartite entangled state without inputs

Shubhayan Sarkar

Quantum steering is an asymmetric form of quantum nonlocality where one can detect whether a measurement on one system can steer or change another distant system. It is well-known that there are quantum states that are entangled but unsteerable in the standard quantum steering scenario. Consequently, a long-standing open problem in this regard is whether the steerability of every entangled state can be activated in some way. In this work, we consider quantum networks and focus on the swap-steering scenario without inputs and find linear witnesses of network steerability corresponding to any negative partial transpose (NPT) bipartite state and a large class of bipartite states that violate the computable cross-norm (CCN) criterion. Furthermore, by considering that the trusted party can perform tomography of the incoming subsystems, we construct linear inequalities to witness swap-steerability of every bipartite entangled state. Consequently, for every bipartite entangled state one can now observe a form of quantum steering.

arXiv:2406.11994•Physical Review A•Feb 18, 2026•1 citation

Quantum steering of a pulse-driven two-qubit system

NASSER METWALLY

The possibility that one party steers their partner is discussed for a driven two-qubit system, where it is assumed that either one or both of them is driving via an exponential pulse. It is shown that the maximum and minimum degrees of steerability and the survival amount of quantum correlation depend on the initial-state settings and the pulsing strength. If only one party is driven, the long-lived steerability is observed at long pulsing time and high strength. However, if both parties are driven, then the steerability's behavior depends on the difference between the strengths of the pulses.

Physical Review A•Oct 15, 2024•5 citations

Quantum Entanglement Information Encoding and Dynamic Topological Networks

Jincheng Zhang

This paper investigates a novel approach to information encoding leveraging quantum entanglement within a dynamically controlled topological network. The core concept involves harnessing the non-local nature of entanglement to achieve transmission rates exceeding those attainable through classical channels. We propose a system where entangled nodes are strategically positioned within a network exhibiting non-exchangeable connections. Dynamic adjustments to the network topology—specifically, modifying the connections between nodes—are employed to manipulate the entangled states, thereby facilitating information encoding and decoding. The key innovation lies in the integration of entanglement information encoding with topological network dynamic control, addressing the limitations of static topological networks and the fragility of entangled states. Mathematical models are presented to describe the system's behavior, focusing on the manipulation of entanglement and the impact of network topology on information transfer. We demonstrate the potential for significantly enhanced information throughput by exploiting the inherent properties of quantum entanglement and the adaptability of topological networks. The proposed framework offers a pathway to robust and high-speed quantum communication.

•Aug 31, 2026•0 citations

Steering Maps and Their Application to Dimension-Bounded Steering

Tobias Moroder, Oleg Gittsovich, Marcus Huber +2 more

The existence of quantum correlations that allow one party to steer the quantum state of another party is a counterintuitive quantum effect that was described at the beginning of the past century. Steering occurs if entanglement can be proven even though the description of the measurements on one party is not known, while the other side is characterized. We introduce the concept of steering maps, which allow us to unlock sophisticated techniques that were developed in regular entanglement detection and to use them for certifying steerability. As an application, we show that this allows us to go beyond even the canonical steering scenario; it enables a generalized dimension-bounded steering where one only assumes the Hilbert space dimension on the characterized side, with no description of the measurements. Surprisingly, this does not weaken the detection strength of very symmetric scenarios that have recently been carried out in experiments.

arXiv:1412.2623•Physical Review Letters•Mar 3, 2016•42 citations
In this contribution, we investigate the possibility that one member of a quantum network can steer the information that encoded in the state of other member. It is assumed that, these members have a direct or indirect connections. We show that, the steerability increases at small values of the channel' strength. Although, the degree of entanglement between the direct interacted nodes is smaller than that displayed for the non-interacted nodes, the possibilities of steering a member of the direct interacted nodes and the non-direct nodes are almost similar.
Quantum steering is a physical resource that has important application value in quantum information. Quantum network coding provides an alternative solution for quantum-state distribution, especially when the bottleneck problems must be considered and high communication speed is required. In this paper, we introduce quantum steering into quantum network coding, and propose a feasible quantum network coding scheme to transmit any of the four quantum states in butterfly networks. By only using the steerable property, we make an attempt to relax the restriction on entangled quantum pairs to quantum steering.
Abstract Quantum steering is the ability that one system affects another one without delay by performing local measurements, which has garnered significant attention in the field of quantum information science. Here, we propose a linear network to realize tunable quantum steering with adjustable measurements. We show that forward steering of the first entangled source can be perfectly transferred to the state of two endpoints, regardless of measurements in the quantum network. However, for the backward steering between two endpoints, it displays a four-leaf clovers with rich symmetries with measurement parameters { θ j } j = 1 N − 1 and is dependent on the parameters { β j } j = 2 N of the input state. By tuning the measurements far away from or close to the optimal values, one-way or two-way steering can be controllably realized. In addition, the error between the actual and optimal measurements is also taken into account in our proposal. The result indicates that a smaller error is beneficial for predicting two-way steering involving multiple measurements. Our proposal offers a promising way to realize the quantum steering transfer within linear networks.
Quantum steering is an asymmetric form of quantum nonlocality where one can detect whether a measurement on one system can steer or change another distant system. It is well-known that there are quantum states that are entangled but unsteerable in the standard quantum steering scenario. Consequently, a long-standing open problem in this regard is whether the steerability of every entangled state can be activated in some way. In this work, we consider quantum networks and focus on the swap-steering scenario without inputs and find linear witnesses of network steerability corresponding to any negative partial transpose (NPT) bipartite state and a large class of bipartite states that violate the computable cross-norm (CCN) criterion. Furthermore, by considering that the trusted party can perform tomography of the incoming subsystems, we construct linear inequalities to witness swap-steerability of every bipartite entangled state. Consequently, for every bipartite entangled state one can now observe a form of quantum steering.
The possibility that one party steers their partner is discussed for a driven two-qubit system, where it is assumed that either one or both of them is driving via an exponential pulse. It is shown that the maximum and minimum degrees of steerability and the survival amount of quantum correlation depend on the initial-state settings and the pulsing strength. If only one party is driven, the long-lived steerability is observed at long pulsing time and high strength. However, if both parties are driven, then the steerability's behavior depends on the difference between the strengths of the pulses.
This paper investigates a novel approach to information encoding leveraging quantum entanglement within a dynamically controlled topological network. The core concept involves harnessing the non-local nature of entanglement to achieve transmission rates exceeding those attainable through classical channels. We propose a system where entangled nodes are strategically positioned within a network exhibiting non-exchangeable connections. Dynamic adjustments to the network topology—specifically, modifying the connections between nodes—are employed to manipulate the entangled states, thereby facilitating information encoding and decoding. The key innovation lies in the integration of entanglement information encoding with topological network dynamic control, addressing the limitations of static topological networks and the fragility of entangled states. Mathematical models are presented to describe the system's behavior, focusing on the manipulation of entanglement and the impact of network topology on information transfer. We demonstrate the potential for significantly enhanced information throughput by exploiting the inherent properties of quantum entanglement and the adaptability of topological networks. The proposed framework offers a pathway to robust and high-speed quantum communication.
The existence of quantum correlations that allow one party to steer the quantum state of another party is a counterintuitive quantum effect that was described at the beginning of the past century. Steering occurs if entanglement can be proven even though the description of the measurements on one party is not known, while the other side is characterized. We introduce the concept of steering maps, which allow us to unlock sophisticated techniques that were developed in regular entanglement detection and to use them for certifying steerability. As an application, we show that this allows us to go beyond even the canonical steering scenario; it enables a generalized dimension-bounded steering where one only assumes the Hilbert space dimension on the characterized side, with no description of the measurements. Surprisingly, this does not weaken the detection strength of very symmetric scenarios that have recently been carried out in experiments.